问题
单项选择题
正常牙髓对温度刺激的耐受阈为
A．5°～25°
B．40°～70°
C．20°～50。
D．30°～60°
E．10°～30°
答案
参考答案：C
解析：正常牙髓对温度刺激的耐受阈为20°～50°。
搜题请搜索小程序“爱下问搜题”
正常牙髓对温度刺激的耐受阈为
A．5°～25°
B．40°～70°
C．20°～50。
D．30°～60°
E．10°～30°
参考答案：C
解析：正常牙髓对温度刺激的耐受阈为20°～50°。
My father was in the navy, which meant that my mother was married to both my father and the sea. As was often the __1__, we had to pack our belongings into boxes and __ 2__ those we had grown to love. We would arrive at our new home and find ourselves once again __3__ at the pier（码头）waving good-bye to my father as his ship pulled him away from us. My mother would turn my brother and me around before the ship was out of __4__, wipe our tears, and take us back home to start the process of __5__ in the new environment again. Throughout the years of changing __6__, schools and friends, there remained one constant in my childhood — my mother. For both my __7_ and me, she was the cook, maid and teacher. She played these roles while __8__ some type of part-time job. Leaving a promising career is just one of the __9__ which my mother made for my family as we moved around the world with our father every three years or so. __10__ she had to deal with only a small budget, my mother __11__ managed to make each house the very home that is safe and __12__. This probably sounds like a depressing way to live, __13__ with two small children: “single” parenthood, short-term friendships, and the inability to __14__ a career or establish a home. But it was not for my mother. She turned this __15__ into adventure for us all! Each relocation was a chance to __16__ another part of the world. My mother __17__ each new culture, climate and neighborhood. Each new house was a __18__ to rearrange furniture, make curtains and hang pictures. Every part-time job was an opportunity to learn something new and work with interesting people. No matter how difficult the life was, she was always having a __19__ attitude. She always had strength in the face of struggle and change. My mother was so __20__all those years of my childhood — she was my island in a sea of change. She is my hero.
|
